Grape plant named &#39;ARRATWO&#39;

ABSTRACT

A new distinct variety of grapevine named ‘ARRATWO’ abundantly forms attractive large seedless berries having deep purple/red skin coloration in large clusters. The fruit displays a natural flavor and is meaty in texture. The fruit commonly is ready for harvesting during August in San Joaquin Valley of Central California, U.S.A., and displays good eating qualities as a table grape. The fruit firmness renders the fruit well amenable for handling, shipping, and storage.

CLASSIFICATION

The present invention relates to a new Vitis vinifera Grapevine.

VARIETY DENOMINATION

The new Grapevine has the varietal denomination ‘ARRATWO’.

BACKGROUND OF THE INVENTION

A breeding program was initiated during the late 90's near Bakersfield in the San Joaquin Valley of Central California. In 2001. during this breeding program, a new variety of Vitis vinifera was created by deliberate cross breeding of two parent plants by emasculation of the pollen bearing organ of the male and introducing pollen from another male origin. The female parent of the new variety was the GAW1 which is a large creamy white very productive seedless grape variety (non-patented in the United States). The male parent (i.e. the pollen parent) of the new variety was GZW5 which is a large red meaty and juicy, seedless grape variety with medium fertility (non-patented in the United States).

Comparison between ARRATWO and Male Parent Red Globe GZW5

ARRATWO Red Globe Berry color Red Grayish red Berry shape Globose Obovate Seed trace None Seeded Density of bunch Very dense Loose

The parentage of the new variety can be summarized as follows:

GAW1×GZW5

An artificial pollination was created, and the result was an embryo which possessed unique genetic qualities. The rudiments resulting from the above pollination were embryo rescued.

In 2002 the plant was transplanted to Bakersfield in San Joaquin Valley of Central California.

It was found that the new grapevine of the present invention possesses the following combination of the characteristics:

(a) Forms attractive large meaty seedless berries with a deep purple/red skin coloration covered with a few blackish spots; in medium-to-large clusters which display a natural flavor;

(b) Commonly bears fruit during the month of August in the San Joaquin Valley of Central California, U.S.A.; and

(c) Bears fruit that is firm and is well amenable for storage, handling and shipping.

The new variety during observation to date has displayed no visible disease, and has displayed an ability to well resist cold, drought, heat; but sensitive to direct exposure to sun and wind. The fruit of the new variety has been found to display excellent handling and shipping qualities combined with desirable dessert eating qualities.

The new variety of the present invention has been found to undergo asexual propagation beginning in 2005 near Bakersfield in the San Joaquin Valley of Central California, U.S.A. by grafting on mature Thompson rootstock (non-patented in the United States). Such asexual propagation has been conducted thereafter in successive years through 2008, and has shown that the characteristics of the new variety are strictly transmissible from one generation to another. Accordingly, the new variety undergoes asexual propagation in a true to type manner. The age of the plant shown in the drawing is five years old and the variety was created in 2001.

SUMMARY OF INVENTION

The new variety ‘ARRATWO’ is a large, deep purple/red seedless table grape with medium to large production, e.g., about 36 to 42 bunches per vine, and an average of about one to two bunches per shoot.

Asexual reproduction by micro propagation of the new variety as performed near Bakersfield, Calif., U.S.A., at Arvin, Calif. Ranch 33 which shows that the forgoing and other distinguishing characteristics come true to form and are established and transmitted through succeeding propagations.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying photographic illustration shows typical specimens of vegetative growth of five year old specimens of the new variety, in color as nearly true as it is reasonably possible to make in a color illustration of this character. Colors in the photograph may differ from the color values cited in the detailed botanical description below, which accurately describes the colors of the new Grapevine.

FIG. 1 shows leaves, stems and grapes of ‘ARRATWO’.

DETAILED BOTANICAL DESCRIPTION

The chart used in the identification of colors is the R.H.S. Colour Chart of The Royal Horticultural Society. The description is based on the observation of plants growing on ‘Thompson Seedless’ rootstock outdoors near San Joaquin Valley of Central California, U.S.A.

-   Vine:     -   -   Vigor.—Vigorous upright shoots.         -   Productive capacity.—Bearing at a natural, average capacity.             Spur pruning.         -   Trunk.—Strong and developed. Ranges from 2″-2⅜″. Rough with             a fibrous, shaggy exterior. Color of the trunk is             greyed-orange (166-B). -   Time of bud burst:     -   -   Early.—Date of bud burst in specified location of culture if             Mar. 23, 2011 in Arvin, Calif. -   Young shoot:     -   -   Openness of tip.—half open.         -   Prostrate hairs on tip.—sparse.         -   Anthocyanin coloration of prostrate hairs on tip.—medium.         -   Erect hairs on tip.—sparse. -   Young leaf:     -   -   Color of upper side of blade.—yellow-green (153-A).         -   Prostrate hairs between main veins on lower side of             blade.—sparse.         -   Erect hairs on main veins on lower side of blade.—sparse. -   Shoot:     -   -   Attitude (before tying).—semi-erect.         -   Color of dorsal side of internodes.—yellow-green (144-A);             grey-red (178-A).         -   Color of ventral side of internodes.—yellow green (144-A).         -   Color of dorsal side of nodes.—yellow-green (146-B).         -   Color of ventral side of nodes.—yellow-green (146-C).         -   Erect hairs on internodes.—absent or very sparse.         -   Length of tendrils.—3 tendrils 7.5 cm each.         -   Color of tendrils.—yellow-green (146-D). -   Flower:     -   -   Sexual organs.—fully developed stamens and fully developed             gynoecium. -   Mature leaf:     -   -   Size of blade.—large (7.5×8 inches).         -   Shape of blade.—pentagonal.         -   Blistering of upper side of blade.—absent or very weak.         -   Number of lobes.—five.         -   Depth of upper lateral sinuses.—shallow. -   Only varieties with lobed leaves: mixture of both sides straight and     both sides convex.     -   -   Arrangement of lobes of upper lateral sinuses.—open.         -   Arrangement of lobes of petiole sinus.—medium, slightly             open.         -   Length of teeth.—medium, 4 cm.         -   Ratio length/width of teeth.—medium.         -   Shape of teeth.—both sides convex.         -   Proportion of main veins on upper side of blade with             anthocyanin coloration.—low.         -   Prostrate hairs between main veins on lower side of             blade.—absent or very sparse.         -   Erect hairs on main veins on lower side of blade.—absent or             very sparse.         -   Length of petiole equal compared to length of middle             vein.—equal, petiole length: 9.5 cm; main vein length: 16             cm.         -   Top side color.—yellow-green (146-A).         -   Bottom side color.—yellow-green (146-B).         -   Texture.—smooth.         -   Vein color.—yellow-green (146-C).         -   Petiole length.—9.5 cm.         -   Petiole color.—greyed-red (182-C).         -   Petiole strips color.—yellow-green (140-B). -   Reproductive organs:     -   -   Color.—green (143-C).         -   Size.—1.2 mm. -   Time of beginning of ripening: July 30 Arvin, Calif. season -   Bunch:     -   -   Size (peduncle excluded).—medium (8×7 inches).         -   Density.—very dense         -   Length of peduncle primary bunch.—2.5 cm.         -   Average bunch weight.—800 g. -   Berry:     -   -   Size.—23.8 mm.         -   Weight.—16 g.         -   Shape.—obtuse ovoid.         -   Color of skin (without bloom).—greyed-purple (185-A).         -   Ease of detachment from pedicel.—difficult.         -   Thickness of skin.—medium.         -   Anthocyanin coloration of flesh.—greyed-purple (185-A).         -   Firmness and color of flesh.—moderately firm, yellow-green             (145-C).         -   Particular flavor.—none.         -   Formation of seeds.—rudimentary.         -   Market use of the observed plant.—fresh market.         -   Berries per bunch.—80 berries. -   Woody shoot:     -   -   Main color.—orange brown (grayed orange 164-A). -   DNA profile: To further the characterize the new Arra variety DNA     was extracted from dried leaf samples and DNA profiles were obtained     in Spain, using base pairs for 14 standard microsatellite DNA     markers. The data is presented hereafter.

Microsatellite DNA Marker Allele Sizes in Base Pairs MSV01 134 152 MSV02 234 234 MSV04 179 181 MSV06 250 254 MSV07 318 322 MSV08 245 258 MSV09 251 257 MSV10 211 215 MSV12 246 259 MSV13 166 168 MSV14 163 176 MSV15 291 299 MSV16 186 186 MSV17 159 159 

1. A new and distinct variety of grapevine, botanically known as Vitis vinifera, identified as ‘ARRATWO’, substantially as shown and described herein. 